![](/media/cache/profiles/2e92962c0b6996add9517e4242ea9bdc.50x50_q85.jpg)
Test application for the library MCP23017_I2C
Dependencies: DebugLibrary MCP23017_I2C mbed
main.cpp
- Committer:
- Yann
- Date:
- 2015-01-09
- Revision:
- 2:83b9df729e73
- Parent:
- 1:e981573db063
- Child:
- 3:3f23faf5f7eb
File content as of revision 2:83b9df729e73:
#include <string> #include <iostream> #include <iomanip> #include "MCP23017_I2C.h" /* * Declare functions */ void AvailableIndicator(); // LED1 flashing for program while program is alive DigitalOut g_availableLed(LED1); // To verify if program in running Ticker g_available; // LED1 will flash with a period of 2s char DisplayMenuAndGetChoice(); void GpioAIntr(); // Interrupt on GPIOA static CMCP23017_I2C g_gpioExp(p9, p10, 0x27, p15, p16, p17); int main() { // Launch available indicator g_available.attach(&AvailableIndicator, 2.0); g_gpioExp.Initialize(0x01); // GpioA<0> as input port, no interrupt mirroring, Active low g_gpioExp.setupInterruptPin(GPA0, AbstractGpioExpender::OnFalling); // A switch with pull-up is connected to GPIOA<0>, interrupt on falling mode g_gpioExp.setIntrACallback(GpioAIntr); // Set callback for interrup on GPIOA<0> while(true) { switch (DisplayMenuAndGetChoice()) { case 'a': g_gpioExp.write(GPB0, 1); break; case 'b': g_gpioExp.write(GPB0, 0); break; case 'c': g_gpioExp.write(GPB2, 1); break; case 'd': g_gpioExp.write(GPB2, 0); break; case 'e': g_gpioExp.write(GPB3, 1); break; case 'f': g_gpioExp.write(GPB3, 0); break; case 'g': g_gpioExp.write(GPB7, 1); break; case 'h': g_gpioExp.write(GPB7, 0); break; case 'i': { std::list<unsigned char> lcdBus; lcdBus.push_back(GPA7); lcdBus.push_back(GPA6); lcdBus.push_back(GPA5); lcdBus.push_back(GPA4); unsigned char busId = g_gpioExp.createBus(lcdBus); g_gpioExp.busWrite(busId, 0x000A); // GPA7=1, GPA6=0, GPA5=1, GPA4=0 g_gpioExp.deleteBus(busId); } break; case 'r': g_gpioExp.reset(); break; default: std::cout << "Invalid user choice\r" << std::endl; break; } // End of 'switch' statement } // End of 'while' loop } void AvailableIndicator() { g_availableLed = !g_availableLed; } // End of AvailableIndicator char DisplayMenuAndGetChoice() { char value; std::cout << "\r" << std::endl << "\r" << std::endl << "MCP23017_I2C v0.1\r" << std::endl; std::cout << "\tSet PortB-0 :\t\ta\r" << std::endl; std::cout << "\tUnset PortB-0 :\t\tb\r" << std::endl; std::cout << "\tSet PortB-2 :\t\tc\r" << std::endl; std::cout << "\tUnset PortB-2 :\t\td\r" << std::endl; std::cout << "\tSet PortB-3 :\t\te\r" << std::endl; std::cout << "\tUnset PortB-3 :\t\tf\r" << std::endl; std::cout << "\tSet PortB-7 :\t\tg\r" << std::endl; std::cout << "\tUnset PortB-7 :\t\th\r" << std::endl; std::cout << "\tReset device :\t\tr\r" << std::endl; std::cout << "Enter your choice: " << std::flush; value = getchar(); std::cout << "\r" << std::endl; return value; } void GpioAIntr() { unsigned char gpioId, gpioValue; wait(0.6); // Debounce timer g_gpioExp.getLastInterruptPin(&gpioId, &gpioValue); // Get interrupt info and clear it std::cout << "\r" << std::endl << "GpioAIntr: interrupt on pin #" << std::hex << std::setw(2) << std::setfill('0') << static_cast<unsigned int>(gpioId) << " - value: " << static_cast<unsigned int>(gpioValue) << "\r" << std::endl; }